Megaplex relay.



' PATENTED APR. 12,1904,

11.11. BNGLER. MEGAPLE; RELAY.

SHEETS-SHEET 1.

APPLIOATION FILED JULY 13, 1903.

llillli W/ TNESSES:

No MDEL.

R. A. ENGLER. MEGAPLBX RELAY.

APILIOATION FILED JULY 13, 1903.

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PATENTED' APR. 12, 1904 2 SHEETS-SHEET 2 Wl TNESSES mf lill A TTOHNE YS -40 11 and with a vpedestal 12, which is secure UNITED STATES PATENT Erica RICHARD A; ENGLER, or minceurs,-iowaA MEGAPLEX RELAY..-

srncrrrcn'rron farming part ernaar; Patent'r0.757,1s4,aata April 12, 1904.

Application led July 18,1903. Serial No. 165,248. G modali) d v l contact with ment the iron say, a portion of the iron v proximity to the magnet 14 causes To all whom it mJn/y'aQn/cern: l

vBe it known that L'RionAn-D A. ENGLEE, a citizen of the United States, and a resident of Dubuque, in the county of Dubuque and State of Iowa, have invented a new and Improved Megaplex Relay, of which the following is a full, clear, and exact description.-

My invention relates to relays, and more particularly to a type of relay forincreasing IO the eiect of feeble 'currents-such, for in.

stance, as are employed in telephony. y

Reference is to be had to the accompanying drawings, forming 4a part of thisspecification, in which similar characters of reference indicate corresponding parts in all the lfigures.

Figure 1 is a cross-section through `the relay-board, showing one of the individual relay mechanisms. Fig. 2 is a plan view of the same, and Fig. 3 is a diagrammatic view showing one method of connecting up the several individual relay mechanisms of my megaplex relay. i

Mounted upon a board 1 is a brass plate 2, provided with extensions 2a 2", as shown bestA 2S in Fig. 2. Upon the extension 2**is appos't 3, provided with a boss 4, of insulating material, which supports a bell-shaped casing 5. `Mounted upon the boss 4 and withi the casing y5 is a metallic disk 6, immediately adjacent to which hangs a spring-wire 7, provided at'its lower end with a` carbon button 8. The diaphragm is shown atl 9 and is mounted in the usual manner. The diaphragm 9, carbon but'- Y ton 8, spring-Wire 7 and metallic disk 6, with their electrical connections, constitute a microphone substantiallyof the kind ordinarilyv employed. f .p Y, p,

Mounted rigidly upon the diaphragm 9 is an iron lever 10, provided with a sloping portion the magnet ly this arrangethe lever to so that the portion 11 is a magnet-pole,v preferablyko considerable power. f A plate 15', of steel, rests loosely upon the plate2 and is providedwith slots `16 17 of the shape indicated in Fig. 2, said plate constituting .one of the poles of the magnet v14. A screw 18 passes through plate 2 andl normally binds generally upon the upper portion i steady saidy plate, but not to able. A post 19 is mounted and is engaged by a leaf-spring 20, which normally presses the post catedin Fig. 1.` This leaf-spring 2O is mounted upon a post 21, provided with an aperture 21a, through which loosely passes a screw 22, mounted rigidly upon the post19. A milled head 23 isrevolubly mounted upon thescrew 22 and may be rotated by thezfingers, so -as ,to draw the post 19 and plate 15 to the-left orto allow them to recede tothe right, as desired. The plate 2 is secured rigidly in position 25 is provided with a milled head 26 and passes through the'slotl'? in the plate 2. 'By'ad- `justing the' screw 18 and the milled head 26 any desired degree of pressure may be exerted upon the plate 15. The plate 15 is normally clamped firmly upon the plate 2, but may be loosened by relaxing the pressure of the milled head 26;'y

An inductioncoil 27 is provided with primary terminals 28' 29, which are connected bythe 4Wires 28 29L withv the respective-binding-screws 30 31. This induction-coil is also provided with secondary terminals 32 33, which are respectively connected by wires 3.2a 33 with'binding-posts 34 35.

Y A number oi' the separate relay mechanisms such as have been described are mounted side by side upon single board, This board forms the yunit of the systemgand, of course, mayfbe','multipliedindefinitely.` In Fig. 3 is shown a diagrammatic, representation of several of the relay mechanisms. In this into the diaphragm 9 byv means of a screw 13.

This iron lever 10 projects alittle distance out from the diaphragm, so that any slight movement of the outer or .free end 11 of the lever` 10 causes the diaphragm 9, t0 press.

ILithSconsiderable force upon thecarbon but-` A permanent magnet 14 isgprovided with a slot 14 inone of its poles, and the iron lever 10 is disposed within this slot 14", but out Of acquire polarity. The lever is thus polarized,

the slot 16 into the of the plate 15, sor a by means of'screws 24. A vertical screw-stem' lever 10 is polarizedthat is to l lever being in close l upon the plate 15 stance the connections are for the most part in series; but I do not limit myself to the arrangement shown, for obviously the several relay mechanisms may be connected up 1n any desired manner, including several different methods of connecting up the batteries with the several primary windings.

By means of binding-posts 436 37 wires 38 .39 are connected respectively with the springwire `7 and the metallic disk 6, so that the.

wires 38 39 constitute vthe terminals of the microphone above described. coil 27 is provided with a core 40, the upper end 41 of which is beveled into conformity with the shape of the portion 11 of the iron lever or armature 10. The core 40 is permanently magnetized by induction from the steel plate 15, constituting one of the poles of the magnet 14, and the lever 10 is always under more or less tension.

Connected with the first of the system of relay mechanisms is a microphone 42, as indicated in Fig. 3. From this microphone a wire 43 leads to a battery 44, whence a wire 45 leads to the primary terminal 29'L of the first induction-coil 27. From the other primary terminal 28 of the first coil a wire 46 leads back to the microphone 42, thus completing the circuit through the primary terminal. From the secondary terminal 32* ofthe first induction-coil 27 a wire 47 leads away from the instrument and forms one ofthe leads to be energized by the relay as a` whole. For convenience the several individ ual groups of relay mechanisms are designated in Fig. 3 by the letters A B C D. From the secondary terminal 33' of the coil 27 at A a wire 48 is connected 'serially with the secondary terminal 32'* of the next coil 27 at B. From the secondary terminal 33 of this coil a wire 49 is connected serially with the secondary terminal 32 of the next coil 27 at C. From the secondary terminal 33* of. this coil a wire 50 leads to the secondary terminal 51 of the induction-coil 51. This coil is of a little different pattern from those already described and is not supplied with the armature 10, as are the other coils. From the secondary terminal 51b of the coil 51 a wire 52 leads out from the system, this wire and the wire 47 constituting the main terminals of the entire system. are connected directly with the line-wire to be energized or which are themselves the line-wires, if so desired.

A number of separate batteries 53 are conq nected with the system, as shown in Fig. 3. From the first microphone of theseries, located at A, a wire 54 leads to one of the batteries 53. From this batterya wire 55 leads downward and is connected with the primary terminal 28L of the coil 27 at B. The relay mechanisms disposed at` B and C are similarly connected. From each microphone disposed at A B C a wire 56 leads to the primary ter- The induction- It is these wires which minal 29l of the next succeeding ,coil 27 as indicated in Fig. 3.

My invention is used as follows: The several parts being connected in the manner described, we will suppose that a person talks into the Amicrophone 42. Fig. 3.) The battery 44 energizes the core 4() of the induction-coil at A, and the core 40 is energized by means of a variable current, as is well understood in the art. This causes the core 40 at A to attract the portion 11 of the armature 10 and to release the same in rapid succession, owing to lthe variations produced by the microphone 42 in the current from the battery 44. The variablemagnetic impulses thus given by the core 40 to the ar# mature 10 causes the diaphragm 9 to bear with greater or less pressure against the carbon button 8, thereby operating the microphone at A. When this microphone is thus actuated, the current :from the battery 53 passing through the wires 54 56 energizes the core 40 of the induction-coil 27 located at B. The action of the core 40 at B upon the armature 10 at B likewise causes the microphone at B to energize the core 40at C, 'and the action of this core in turn similarly ener-- gizes the core of the coil 51 at D. Each time .the core 40 is subjected to avariation in the strength of the current exciting it the field of force surrounding the core of course acts inductively upon the secondary winding of the coil. The result is that the variation in the several primary circuits generate momentary currents in the'several secondary windings, the intensity in each secondary winding being equal to that of the secondary winding of the coil usually employed in telephony. When these windings are connected serially, as indicated in Fig. 3, it is obvious that all of the secondary currents have at any particular moment the same direction, so that their intensity is cumulative. By this vmeans the delicate movements in the microphone 42 cause great variations in the strength of the current flowing through the wires 47 and 52. These currents are also due in a great measure to the addition of many secondary currents.

I am aware that in the systems ordinarily employed the use of aninduction-coil or trans-V former is very common. That a primary winding may excite a core and a core in turn may produce a current of great intensity in a secondary winding is a foregone conclusion. I am not aware, however, that the field of force used in energizing and deenergizing the core of aninduction-coil has erate an armature, which in turn automatically actuates a microphone, the microphone actuated byone armature being used to actuate the next induction-coil.

By the arrangement above described a muchgreater value is given to the sound-waves in .the start1ng-m1crophone 42 than can be secured by the ordinary arrangement, for the (Shown at the left in y IOS been made to op- I reason that each successive diaphragm vibrates with the same energy as that of the microphone 42., The magnetism that induces the gurrent in each secondary winding is 1n turn employed to operate another microphone.v The field ofv force upon each core is contlnuvally appearing and disappearing, or rather is continually varying, and I see nothing to prevent the energy otherwisetl'ius wasted from' actuating thev lever which controls the dia'- phragm of anotherr microphone. The logic of this statement is found in the'factthat only a comparatively small proportion of the energy of the field is utilized in the ordinary system, most of the energy going to Waste.

|The word megaplex as herein used is intended to convey the idea of an amplifying device 'usedfor strengthening electric pulsa-- tions and undulations, its structure being such as to increase the eiiect in various Ways, and especially'to permit several distinct devices to act cumulatively.

Having-thus described my invention, I claimV as new and desire to secure by Letters PatentM l. In a megaplex relay, the combination of a microphone, an induction-coil having primary terminals connected therewith and alsor -having secondary terminals, a battery connected with said microphone and with said primary terminals, another microphone connected withsaid induction-coil and actuated thereby for controlling an independent circuit, and electrical connections for said secondary'terminals of said induction-coil and for said independent circuit. Y

2. In a megaplex relay, the combination of a plurality of microphones and a plurality of induction-coils, each of said induction-coils being provided with primary and secondary terminals and each of said microphones being lconnected in series with the primary terminals of another induction-coil, the secondaries of said induction-coils being yconnected in series with the line.

3. In a megaplex relay, the combination of a plurality of microphones, and a plurality of induction-coils, each induction-coil being provided with primary and secondary terminals,

and each of said microphones being connected in series with the terminals of an inductioncoil, the secondaries of said induction-coils being connected in series with each other and with-the line.

4. In a megaplex relay, the combination of a number of induction-coils each having a core together with primary and secondary terminals, microphones having an armature conltrollable by the magnetic field of said cores, electrical connections for said microphones, andwiring connecting said secondary termi- -nals in series with each other.

5. In a megaplex relay, the combination of a plurality of induction-coils, each provided with a core together with primary and secondary terminals, a plurality of microphones connected with said primary terminals and also connected with a source of electricity for the purpose of energizing said cores, and electricalconnections for binding said secondary terminals in series with each other.v

6. In a megaplex relay, the combinationof a plurality of induction-coils, each provided with a core together with primary and second- ,ary terminals, and a plurality of microphones connected with saidprimary terminals and also connected with'a source of electricity for the purpose of energizing said cores, said secondary terminals of the several induction-coils being 'connected in series with each other and with the line.

7. In a megaplex relay, the combination of a stationary member, a movable member mounted thereupon, an induction-coil mounted upon'said movable member and vprovided with a core, a stationary microphone provided with an armature disposed adjacent to said core, and means for adjusting the distance between said core and said armature.

8. In a megap'leX relay, the combination of an induction-coil provided vwith primary and secondary windingsl and a microphone and a source of electricity connected with said primary winding, a microphone disposed adjacent to said induction-coil and provided with a `movable armature actuated directly by the magnetic iniiuence thereof, a source of 'electricity connected with said last-mentioned microphone, and another induction-coil having a primary and a secondary Winding, said primary winding being connected with said lastmentioned microphone and said secondary winding being connected with said secondary winding of said iirst-mentioned induction-coil.

9. In a megaplex relay, the combination of an induction-coil provided with a primary and a secondary winding, a microphone connectedl with said induction-coil and vactuated by the magnetic attraction thereof, a source of electricity connected with said microphone, another induction-coil provided with a primary and a secondary winding, wiring connecting the primary winding of said last-mentioned coil with said microphone, and means for connectng the secondary windings together in series with each other and with the line.

10. In a megaplex relay, the combination of' a plurality of induction-coils each provided with a primary and a secondary winding, means for connecting l.the several secondary windings in series with each other and with the line, a microphone disposed adjacent to each of said induction-coils and provided with a vibratory armature actuated by the magnetic attraction thereof, and electric connections between said microphone and the primary winding of one of said induction-coils.

11. In a megaplex relay, the combination of an induction-coil provided with primary and secondary windings, a microphone. having a vibratory magnetic member disposed adjacent IOO IOS

IIO

ment being such that the spew@ bmcwan said En to said inductionmni and uclmi'wm the magnemc a'iamctwn thmmm, th@ mwmge by said secondary g and mim 4 31x" mimic currents. v imonywh-m nave signed my name vibratory armature and said mdnstionmoi is tu thm gflmnicatmn inw@ presence of two subg'eatex' at onefmonner th'anhat ano'zhez' for smbmg W'uesss. l 1

t e purpose o contro ing; t magnatic inuence of said induction-coil upn smid vibrar I RICHARD A' ENGLER tory armature., the currents gew-:rami im said 1 Y fes: y secondary Winding being Varied. 'dhrhm and E., 'ffl/ TANGEMAN, means for rendxrng cumutive @h6 @imam nf Hmmmw (l DNGSTER. 

